bass coast earthmoving Posted December 27, 2013 Share Posted December 27, 2013 Can anyone tell me the best place to start trying to reduce cabin noise in a 86 R model 350hp Quote Link to comment https://www.bigmacktrucks.com/topic/34034-less-cabin-noise-r-model/ Share on other sites More sharing options...
vision386 Posted December 27, 2013 Share Posted December 27, 2013 Dynamat at both the firewall and the floor probably the best place to start in my opinion.............................................Mark Quote Mack Truck literate. Computer illiterate. Link to comment https://www.bigmacktrucks.com/topic/34034-less-cabin-noise-r-model/#findComment-223335 Share on other sites More sharing options...
Mike Posted December 27, 2013 Share Posted December 27, 2013 Like Mark said. And the doors are an excellant choice to baffle also and easy to install. Quote Link to comment https://www.bigmacktrucks.com/topic/34034-less-cabin-noise-r-model/#findComment-223342 Share on other sites More sharing options...
bass coast earthmoving Posted December 27, 2013 Author Share Posted December 27, 2013 What's dynamat Quote Link to comment https://www.bigmacktrucks.com/topic/34034-less-cabin-noise-r-model/#findComment-223364 Share on other sites More sharing options...
rickykarenpr Posted December 27, 2013 Share Posted December 27, 2013 I have one 1989 Mack R688ST with econodyne engine sound good and works good Quote Link to comment https://www.bigmacktrucks.com/topic/34034-less-cabin-noise-r-model/#findComment-223368 Share on other sites More sharing options...
MACKS Posted December 27, 2013 Share Posted December 27, 2013 What's dynamatIts high priced roof flashing,just go to lowes and get a few rolls.it will help a lot but the key to a quiet truck is cab isolation,check your cab mounts or up grade to air ride cab. Quote Link to comment https://www.bigmacktrucks.com/topic/34034-less-cabin-noise-r-model/#findComment-223377 Share on other sites More sharing options...
Lmackattack Posted December 28, 2013 Share Posted December 28, 2013 Dynamat helps but to get the noise level down you really need a thick pad 1 or 2" thick to go under the floor and of the firewall. We just did a r model that I drive with dynamat on the floor,roof and rear wall. ( still need to do The firewall.) it helped some but it is nowhere near as quiet as my rs700 with a thick insulation pad on the floor and firewall. Search for the stuff used on generator boxes to quiet them down. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/34034-less-cabin-noise-r-model/#findComment-223384 Share on other sites More sharing options...
j_martell Posted December 28, 2013 Share Posted December 28, 2013 Can anyone tell me the best place to start trying to reduce cabin noise in a 86 R model 350hpWear ear plugs..... Quote Lack of planning on your part does not constitute an emergency on my part.... Link to comment https://www.bigmacktrucks.com/topic/34034-less-cabin-noise-r-model/#findComment-223385 Share on other sites More sharing options...
rsb502 Posted December 28, 2013 Share Posted December 28, 2013 look up dynamat online, you can get it from several places, its a little different than the roofing material but close, http://www.dynamat.com/products_intro.html I have used it on a couple trucks and it works great, you have to do the firewall and floor for engine and road noise and the back wall and roof for exhaust noise. I used two layers of the Dynamat extreme in the past but now they have the dynaliner, I plan to put one layer of dynamat extreme then a layer of 1/4" dynaliner on the floor and firewall and the ceiling and back wall will get a layer of dynamat extreme and the ceiling will get a 1/2" dynaliner. It aint cheap but it works freakin great and it stops the rattles and squeeks too. Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment https://www.bigmacktrucks.com/topic/34034-less-cabin-noise-r-model/#findComment-223408 Share on other sites More sharing options...
bass coast earthmoving Posted December 28, 2013 Author Share Posted December 28, 2013 Thanks a lot everyone and had enough of ear plugs Quote Link to comment https://www.bigmacktrucks.com/topic/34034-less-cabin-noise-r-model/#findComment-223431 Share on other sites More sharing options...
MACKS Posted December 28, 2013 Share Posted December 28, 2013 Just keep in mind the dynamat or roof flashing does not stop noise from coming into the truck what it does is stop the metal from vibrating, just knock on the outside of your door and you will hear that hollow sound and after applying the dynamat you will have a nice solid sound,also a big help if the cab has some interior padding to absorb the sound waves that are bouncing around. The best sound deadener insulating material is sold in the marine stores like west marine, think its called sound down or something like that,it pricy but the best out there..good luck Quote Link to comment https://www.bigmacktrucks.com/topic/34034-less-cabin-noise-r-model/#findComment-223441 Share on other sites More sharing options...
HarryS Posted December 28, 2013 Share Posted December 28, 2013 Has anyone used Dynamat or some other sound deadner under the hood on a B Model. Seems like there is a lot of noise and vibration going on there. I am not sure how well it would stick. Quote Link to comment https://www.bigmacktrucks.com/topic/34034-less-cabin-noise-r-model/#findComment-223463 Share on other sites More sharing options...
rickykarenpr Posted December 28, 2013 Share Posted December 28, 2013 try change the engine from Dynamat to E7 350 Turbo works better Quote Link to comment https://www.bigmacktrucks.com/topic/34034-less-cabin-noise-r-model/#findComment-223468 Share on other sites More sharing options...
d427 Posted December 28, 2013 Share Posted December 28, 2013 []I'm about to start on my interior as well. I paint luxury cars for a living and they all have versions of Dynamat in them from factory. We use the same thing only it is made by a company called Kent. It is the same thickness and is way cheaper than Dynamat. I am going to use a spray in silly string insulator on back cab and roof because it will still flex and is very durable. Most cars have it inder wheelhouses but it is not undercoating. I am also going to coat floor and firewall with a product called Lizard Skin. It is ceramic insulation and sound deadoning thick roll on coating followed by Kent version of Dynamat. that should reduce interior cab noise by about 50% Quote Link to comment https://www.bigmacktrucks.com/topic/34034-less-cabin-noise-r-model/#findComment-223474 Share on other sites More sharing options...
j_martell Posted December 31, 2013 Share Posted December 31, 2013 try change the engine from Dynamat to E7 350 Turbo works better?????? 1 Quote Lack of planning on your part does not constitute an emergency on my part.... Link to comment https://www.bigmacktrucks.com/topic/34034-less-cabin-noise-r-model/#findComment-223993 Share on other sites More sharing options...
keg1 Posted December 31, 2013 Share Posted December 31, 2013 try change the engine from Dynamat to E7 350 Turbo works better???? x2 Quote Link to comment https://www.bigmacktrucks.com/topic/34034-less-cabin-noise-r-model/#findComment-224165 Share on other sites More sharing options...
rsb502 Posted January 1, 2014 Share Posted January 1, 2014 Has anyone used Dynamat or some other sound deadner under the hood on a B Model. Seems like there is a lot of noise and vibration going on there. I am not sure how well it would stick.They make an underhood material, get on their website. Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment https://www.bigmacktrucks.com/topic/34034-less-cabin-noise-r-model/#findComment-224261 Share on other sites More sharing options...
Quickfarms Posted January 2, 2014 Share Posted January 2, 2014 Db engineering makes some nice products to insulate the firewall, floor, cab roof and cab back wall Quote Link to comment https://www.bigmacktrucks.com/topic/34034-less-cabin-noise-r-model/#findComment-224442 Share on other sites More sharing options...
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